Hello, again my friendly neighboorhood readers!
This week I have been again been reading up on those crazy Antipatterns I discovered week. As you can probably tell by the title, the Antipattern I am writing about this week is a Halloween themed Antipattern. I know it’s a little late but today’s Antipattern is the Poltergeist.
A Poltergeist is a class that has a limited role to play or limited responsibilities in a system. This practice adds unnecessary abstraction and their short life cycle means more wasted resources. Poltergeists normally appear to initiate some other action of a class that has a more permanent status. A Poltergeist is easily identifiable as they will typically bear the “_manager” or “_controller” title in their name. The main three disastrous effects of the Poltergeist Antipattern is a waste of resources every time they are called, they utilize redundant navigation paths, and the clutter the object model, getting in the way of proper object-oriented design. If a Poltergeist Antipattern is left alone it can result in such occurrences as transient associations, stateless classes, redundant navigation paths, short duration, temporary classes, and objects, and single operation classes. Some typical causes that lead to a Poltergeist Antipattern manifesting are a lack of object-oriented architecture, using the incorrect tool for the job, and of course, a specific disaster such as management incompetence.
Now how do we fix this Poltergeist problem? Well, they gotta go. Of course, once the Poltergeists are gone, the functionality they had must be replaced with an adjustment to the architecture. Another solution is to utilize the 80% solution that we discussed in the post discussing the Blob Antipattern.
Now, I do not know about you reader, but I believe that this is definitely an Antipattern that every programmer falls prey too, especially when they are beginning. I can think of many programs that I have many over the years that have had at least one Poltergeist stalking around in them. This does make me rethink how I will program in the future. While the programs I may write now do not need any real optimization, in the future, optimization is going to be a required skill for me.
Well, that is it for today readers. Have a good week until next time!